Z306-100-A50R by Benchmark Scientific (Hermle) is a 2-pack of 50 ml round-bottom tube inserts for the Hermle Z306-100 swing-out rotor, compatible with Hermle Z306 and Z326 Universal Centrifuges. These inserts adapt the Z306-100 bucket to accept 50 ml round-bottom tubes for high-volume cell biology and sample preparation workflows.